RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Kaolinite
Reference: HCLK05
SCM Type: 1pK-BS - 1pK-Basic Stern
Ligand: Pb<2+> - lead
Site Type: »X-OH
Equation: »X-OH<0.5-> + Pb<2+> + H2O  ⇔  »X-OH-Pb(OH)<0.5+> + H<1+>
LogK: 10.0        LogK°I=0 (Conversion to I = 0):   10.13         LogK2.31 nm−2 (SSD-normalized):   9.81
Experiment: Potentiometric Titration
Ionic Strength: 0.01 mol/L NaNO3
Temperature: 298.0 K
Solid/Liquid Ratio: 5.0 g/L
pH Range: 4-6
Fit Method: ECOSAT
Comment: sorption onto edge sites (XOH0.5-) was modeled with a 1pK-basic Stern approach; cation sorption onto permanently charged face sites (X-) described by 3 models: Gaines-Thomas equation (GT), basic Stern (BS), extended basic Stern (BS ext) (see article for fitted parameters and constants of the face sites, log K only valid in combination with these values)
here: BS/BS ext
 
1 data sets were retrieved